Home / 3,119.36-4,679.28-928.08

Finding the Fourth Proportional to 3,119.36, 4,679.28 and 928.08

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Solution

The fourth proportional to 3,119.36, 4,679.28 and 928.08 is: 1,392.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.36 : 4,679.28 = 928.08 : x
  2. Step 2: Convert to fraction form
    3,119.36/4,679.28 = 928.08/x
  3. Step 3: Cross multiply
    3,119.36x = 4,679.28 × 928.08
  4. Step 4: Simplify right side
    3,119.36x = 4,342,746.18
  5. Step 5: Solve for x
    x = 4,342,746.18/3,119.36
  6. Step 6: Final answer
    x = 1,392.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.